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Journal of the Korean Ceramic Society 1980;17(3): 141. |
| $Si_2O-Al_2O_3$계의 열팽창성에 관한 연구 |
| 이종근, 이병하, 전승관 |
| 한양대 무기재료공학과 |
| Study on Thermal Expansion of $Si_2O-Al_2O_3$ System |
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| ABSTRACT |
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Thermal expansion property of $SiO_2-Al_2O_3$ system consisted of Muan clay, Hadong Pink Kaolin and Dangjin Silica was studied. Specimens were heated at the constant rate of 18$0^{circ}C$/hr to the max. temperatures of 115$0^{circ}C$ to 130$0^{circ}C$ with an interval of $25^{circ}C$, and matured for 3hrs. The result of X-Ray diffraction analysis showed that main crystals formed were $alpha$-quartz, $alpha$-cristobalite and mullite. Linear thermal expansion was measured at 90$0^{circ}C$. The results of the linear thermal expansion were decreased regularly with the increase of the sintering temperature in accordance with the following equation. $y=5$chi$perp1100^{circ}$. Where $chi$ is amounts of kaolin (wt%), and y is temperature of the changing point of linear thermal expansion. |
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